Tissue-specific responses to loss of transglutaminase 2.
Tissue-specific responses to loss of transglutaminase 2.
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DOI:
10.1007/s00726-011-1183-9
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发表时间:
2013-01
期刊:
影响因子:
3.5
通讯作者:
Nurminskaya, Maria
中科院分区:
文献类型:
--
作者:
Deasey, Stephanie;Shanmugasundaram, Shobana;Nurminskaya, Maria
Of the eight catalytic transglutaminases (TGs) transglutaminase 2 (TG2) has been the most comprehensively studied due to its ubiquitous expression in multiple cell types. Despite the observed critical role for this enzyme in multiple biological processes in vitro, TG2 knock-out mouse models have shown no severe developmental phenotypes, suggesting compensation by other TGs. To begin characterization of the compensating mechanisms, we analyzed total transamidating activity and expression patterns of all catalytically active TGs in seven different tissues/organs from wild-type and TG2 knock-out mice. Inhibitory analysis with TG2-specific inhibitor KCC-009 suggests that relative contribution of TG2 in total transamidating activity differs in various tissues. Accordingly, our data indicate tissue-specific mechanisms of compensation for the loss of TG2, including transcriptional compensation in heart and liver versus functional compensation in aorta, kidney and skeletal/cartiagenous tissues. On the contrary, no compensation has been detected in skeletal muscle, suggesting a limited role for the TG2-mediated transamidation in normal development of this tissue.
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